Comments: The phase of a pixel in a conventional SAR images consists out of two terms. The first one is the geometrical phase due to the distance between sensor and object. This is a strictly deterministic term. The second one is the so-called object phase which results from the scattering process on the object. For distributed targets, this is a random value, because the phase of the coherent summation of all individual scatterers can result in any value. For point-like scatterer (only one dominant scatterer in the pixel) the phase depends on the geometry and dielectrical constant of the target. Summarizing: the phase of a SAR image is usually completly random in most areas.